Abstract: A positioning unit, a positioning system and a positioning method thereof are provided. The positioning method is used in the positioning system and includes: receiving a plurality of global navigation satellite signals and generating a first satellite-positioning data by a first Global Navigation Satellite System (GNSS) radio unit; receiving the plurality of global navigation satellite signals and generating a second satellite-positioning data by a second Global Navigation Satellite System (GNSS) radio unit; receiving the first satellite-positioning data by a first GNSS unit; receiving the second satellite-positioning data by a second GNSS unit; and estimating a first positioning data and a second positioning data according to a measurement data of the vehicle, the first satellite-positioning data and the second satellite-positioning data by a dead-reckoning unit, the dead-reckoning unit outputs an output-positioning data correspondingly.

Abstract: A hand-held device having positioning and photographing functions and geographical positioning methods thereof is provided. The hand-held device includes a photographing module, a positioning module, a database and a processor. The photographing module photographs environment of a shooting place to form a digital picture. The positioning module accesses a positioning data of the shooting place. The processor matches the positioning data of the shooting place with a geographical positioning condition when the digital picture is obtained, so as to get a target geographical area data corresponding to the shooting place, from all geographical area data. The target geographical area data is displayed on the digital picture corresponding to the shooting place and the geographical positioning condition is an area center data of every geographical area data or plural boundary pointers which include boundary coordinates of every geographical area data.

Abstract: A hand-held device having positioning and photographing functions and geographical positioning methods thereof is provided. The hand-held device includes a photographing module, a positioning module, a database and a processor. The photographing module photographs environment of a shooting place to form a digital picture. The positioning module accesses a positioning data of the shooting place. The processor matches the positioning data of the shooting place with a geographical positioning condition when the digital picture is obtained, so as to get a target geographical area data corresponding to the shooting place, from all geographical area data. The target geographical area data is displayed on the digital picture corresponding to the shooting place and the geographical positioning condition is an area center data of every geographical area data or plural boundary pointers which include boundary coordinates of every geographical area data.

Abstract: The dual mode positioning system comprises multiple wireless network devices, one of the multiple wireless network devices including a GPS receiver. DSS is coupled to the multiple wireless network devices and an operation mode switch is also coupled to the multiple wireless network devices including a GPS receiver. A satellite GPS receiver coupled to the operation mode switch. The satellite GPS receiver is operated in an indoor area confined by walls with wide FOV (field of view) glass window, the operation mode switch switching to GPS mode for the satellite GPS receiver receives signals from greater than 3 satellites. Moreover, the satellite GPS receiver is operated in an indoor area confined by concrete walls or walls with narrow FOV glass window, the operation mode switch switching to Joint GPS/WPS mode for the satellite GPS receiver cannot receive signals from greater than 3 satellites.

Abstract: The dual mode positioning system comprises multiple wireless network devices, one of the multiple wireless network devices including a GPS receiver. DSS is coupled to the multiple wireless network devices and an operation mode switch is also coupled to the multiple wireless network devices including a GPS receiver. A satellite GPS receiver coupled to the operation mode switch. The satellite GPS receiver is operated in an indoor area confined by walls with wide FOV (field of view) glass window, the operation mode switch switching to GPS mode for the satellite GPS receiver receives signals from greater than 3 satellites. Moreover, the satellite GPS receiver is operated in an indoor area confined by concrete walls or walls with narrow FOV glass window, the operation mode switch switching to Joint GPS/WPS mode for the satellite GPS receiver cannot receive signals from greater than 3 satellites.